The defending champion was bundled out of the fourth round of the Australian Open by big-hitting American Coco Vandeweghe

Australian Open: Kerber becomes latest big gun to draw blank

Roger Federer will play Zverev, who earlier stunned the sporting world by beating world number one Andy Murray

Australian Open: Old warhorse Federer outlasts Nishikori in titanic five-set battle

The Spaniard will face Gael Monfils in the fourth round, while Milos Raonic beat Simon to progress to the next round

Australian Open: Rafael Nadal staves off Zverev challenge

In the women's section, defending champion Angelique Kerber finally came into her own as she beat Kristyna Pliskova in straight sets

Australian Open: Andy Murray, Stan Wawrinka march on to Round 4

Defending champion Novak Djokovic was beaten in five sets in the second round by Uzbek wildcard Denis Istomin

Defending champion Djokovic knocked out of Australian Open

Defending champion Novak Djokovic will now take on Uzbekistan's Denis Istomin in the second round

Australian Open: Djokovic beats Verdasco to enter second round

Roger Federer made a winning start beating Austrian qualifier Juergen Melzer in the first round

Australian Open: Federer, Nadal enter second round

The former US?Open champion has been dogged with wrist injuries for the past three years

Juan Martin del Potro to skip Australian Open over injury concerns

Maria Sharapova, one of the biggest names in tennis, tested positive for the banned medication meldonium during January's Australian Open

Sharapova out of Rio as CAS delays doping decision

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